Roller bearing working roll chuck



Aug. 23, 1932. E. B. HUDSON ROLLER BEARING WORKING ROLL CHUCK 2Sheets-Sheet 1 Filed Aug. 2, 1928 6M1 all 1932- E. B. HUDSON ROLLERBEARING WORKING ROLL CHUCK Filed Aug. 2, 1928 2 Sheets-Sheet 2 \& a I

- INVENTOR.

BY 0 WW 1 am ATTORNEY.

,4, e11 thrust upon the working rolls;

this factor, as well as other types of thrust Patented Aug. 23, 1932STATES PATENT may 'i'f Enwnv- B. rwnsomor BuTLnarEunsYLvA IA,Assumes-TTHE AMERICANYROLL- I1\TG-1VIILL COMPANY, or mnnrnrowu, c1110, ICORPORATION or cure ROLLER. BEARING wonxiuc ROLL cHucK My inventionrelates to the provision of working roll bearings in what are known asfour high mills. In these members the working rolls "areof'com'paratively small diameter 5 and'bear against-back up rolls ofconsiderably larger diameter, the bearings of which sustain the greaterpart of the vertical load.

Itis old to apply roller bearings to the back up roll. There is-noparticulardifliculty involved in doing this because bearings ofsufficient size to sustain the 'verticaland horizontal thrusts may beapplied. Hitherto however, "roller bearings or the like, have not beenapplied to the Working rolls;

' Prior practice has utilized brasses bearing against the rolls and heldin place by wedges. This method of aligning is very unsatisfactory,since it gives no assurance c. that the rolls will be in alignment aftersetting} The brasses continually wear and they "require continualadjustment. Furthermore, the adjustment thereof must be accurate.

tically aligned, but the axis of their aligninent is oifset a certaindistance, usually- A; of an inch, from the .axis of alignment of thebackup rolls. There is there-fore a horizon- Due to and under theoldpractices, the working rolls-require continuous attention. 'Not onlymust the properoffset alignment be maintained but the axes of the rollsmust not twist with respect to each other even when metalis being rolledbetween them; Again, it should be pointed out that the setting" of thebrasses by means of the wedges is done more or'less in the blind, withdefinite fixed IE0 points to indicatethat proper alignment has beenaccomplished, but'with nothing to indicate thatthe fixed point-sthemselves indicate the best alignment.

With the present practice, it is practical- 545 ly impossiblerto keepthe brassesproperly lubricated because mill water is constantly washingthe lubricant away. Lack of proper lubrication of course, results in therapid Wear of the brasses', increases the necessity of continualattention to'alignment and inany special marks As will be understood byone skilled in the art, the working rolls are ver- Application filedAugust 2 1928. Seriallfo. 296,951.

volves costly replacementsalong with delays 'in production when themills are closed down.

It is an'object of my invention to provide proper alignment of therolls, in such a way that it will not be affected bywear occurring inbrasses. I 7

Another object isto provide chucks whereby the working rolls may bealigned in prop"- er oflset' relation to the backing up rolls, qulcklyand easily andwithout the'use of or the like toindicate alignment. j

A further object is to provide. a chuck by means of which the centerline of the working rolls may be fixed with relation to a certain partof the mill, and will be unaffected in'that-fixed position by rapid wearof the parts. Still another object is torprovide a chuck whereintherolls can be mounted in an anti-frictional manner, and whereinthebearing surfaces can be protected from the flow of mill water, wherebyproper lubrica tion can be maintained at all times.

Still another object of niy invention is to provide" for the readychanging of rolls and 1 to eliminate the delays due to the old methodsof alignment, these and other objects which will be apparent to oneskilled in the art'who reads these specifications, I accomplish by thatnovel construction andarrangement of parts of which I shall now describea preferredembodiment, reference being made to thedrawings whichaccompany these specifications and in which like parts are designated bythe same reference characters. In the drawings: e Figure 1 is apart'side elevation'showing the chucks in place.- A part of this drawingis in section. I

' Figure 2 is a longitudinal section through one of my chucks showingthe position of the Wedge, and the anti-frictional roller and ballbearings. This section is taken along the lines 22in Figure 1. V

Figure 3is a perspective view of the wedge used to keep the workingrolls on a fixed center line. 7 1

I have shown in Figure 1 the main frames 1 Of afour high rollingmill,-up0n which frames are mounted the backing up rolls 2 and theworking rolls 3. The working rolls 3 are mounted in chucks 4, in theconstruction of which my invention has its primary application. The backup rolls in these chucks are designed to be mountedin a fixedpositionrelative to a machined face 5 shown as lying on the right side of themain frame. Since my rolls are mounted in roller bearing chucks, ifthese chucks bear the proper relationship to the face 5, amounting ofthem in that relationship iswall that is necessary. And an operator isnot required to'do' anything further to adjust the position of. therolls either with reference to each other in vertical alignment or withreference to the backing rolls in proper offset relation therefrom.

The chucks are held against lateral movement with relation to themainframes by means of the'adjustable clamps 6 which are bolted to themain frames by cap screws 7. The chucks in addition to being heldagainst lateral movement by the clamps, rest upon projecting machinededges 8 which support them vertically and prevent'the chucks and workingrolls from descending in the frames beyond a predetermined point. 'Themachined face 9 of the chuck is held in contact with a machined face 10on the main frame opposite the machined'face 5, by a wedge 11 to bedescribed. Keeping the machine faces 5 and 10 in contact withthe chuckat all times, by means of the wedge, results in maintaining the chuck ina fixed position, though movable vertically in the main frame, andmaintains the working rolls in proper relationship to each other and tothe backing up rolls. The members fixing theposition of the rolls arebearing against stop surfaces which are not subject to excessive wearingconditions.

Since these surfaces are on both sides'of the mill, the aligned centersof the rolls must necessarily be fixed and maintained throughoutqtheirvertical movement, and'there can be no twist of the axis of one rollwith respect to the axis of the other. The wedge 11 which is clearlyshown in Figure 3 has a sloping side 12 which bears against a similarlydeveloped surface 13 (Figure 2) in the chuck. When this is done, thestraight side 14 on the wedge is parallel to the machined surface of theframe and is ready to accomplish the fixing of the roll centers.

Strips 15 may be interposed between the chuck and the main frame ifdesired.

The top of the wedge has a T slot 11a in which I insert the head of abolt 16 which I use to adjust the wedge with reference to e chuck tocome in contact and be held against the machined face 5 of the frame atthe right side. The screw 16 passes through a boss 17 which is a part ofthe chuck, and carries a nut 18 on its outer end.

The neck of the roll 3 is mounted on roller bearings 21 within the chuckand these bearings carry the radial loads. Ball bearings 22 abutoppositely disposed shoulders on the chuck and on the sleeve surroundingthe neck of the roll and their purpose is to carry the thrust loads. 7The combination of roller and ball bearings produces a low frictionbearing which is highly desirable and is adequate to sustain the, loadsapplied upon the rolls. "The roller bearings 21 operate ina raceway 25,and bear against the sleeve 23. Rings 26 and 27 serve to hold theraceway in place upon the sleeve. The ball bearings 22 have a holder 28and it will be more clearly understood from Figure 2 how these ballstake the end thrust; The same figure also shows very clearly how theentire bearing is housed and protected from mill water, It will be seenthat-felt washers 29 close the opening between the sleeve and thehousing and that felt washers 30 close the opening between the housingand the neck of the roll.

In order to adjust a working roll in position, I place the chuck betweenthe main frames and hold it there against lateral. movement by means ofthe clamps. When the clamps are'fast in place, I tighten up on the nut18 whereby the wedge is tightened up between the chuck and the frame.The chuck is caused to move to the right, until it comes into positionagainst the machined face 5 and this face positively aligns the chuck.The roll mounted in fixed bearings within the chuck is of course alignedwhen the chuck is aligned; and it will be readily understood that thewhole assembly is quickly put in place and very easily adjusted.

I have found it possible by the construction which I haveoutlined, toplace upon the working rolls of four high mills roller and ball bearingsof sufficient size to sustain the vertical and horizontal thrusts andthe end thrusts even though the space is limited. This is facilitatedbecause in four high mills, the greater part of the vertical thrust isborne by the bearings of the back up rolls, and as distinguished fromthree high mills, there is a back up roll for each working roll. Thespace for'workin roll bearings is limited; but by my construction Isecure'a sufliciently strong and adequate bearing.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent, is

1. ,A chuck forthe working rolls of four high mills, said chuckcomprising a machined face upon one side adaptedto bear against amachined face on the mill frame, means on the other side of said chuck,to cause said machined face to bear against the machined face on saidframe by abutting an opposed frame member and a fixed anti-frictionalbearing for the neck of a working roll, said bearing comprising a rollerbearing to sustain radial thrusts and a ball bearing to sustain lateralthrust, said bearings comprising a sleeve to encircle the neck of aworking roll, roller bearings between said sleeve and said chuck,

a shoulder on said sleeve, a shoulder borne by a said chuck, and ballbearings abutting both shoulders to sustain end thrust.

2. A chuck for the'working rolls of four high mills, said chuckcomprising a machined face upon one'side adapted to bear against amachined face on the mill frame, means on the other side of said chuckto cause said machined face to bear against the machined face on saidframe by abutting an opposed frame member and a fixed anti-frictionalbearing for the neck of a working roll, said bearing comprising a rollerbearing to sustain radial thrusts and a'ball bearing to sustain lateralthrust, said bearing comprising a sleeve to encircle the neck of saidWorking roll, roller bearings between said sleeve and said chuck, ballbearings between said sleeve and said chuck, closure members for makinga lubrication tight joint between said sleeve and said chuck and betweensaid chuck and said roll neck and means for introducing lubricant intothe interior of said bearing. 3. A chuck for the working rolls of fourhigh rolling mills, said chuck containing a fixed anti-frictionalbearing comprising a sleeve to encircle the neck of a roll, a shoulderon said sleeve forming a raceway for ball bearings, a surface on saidsleeve forming a raceway for roller bearings, a housing, for rollerbearings bearing against said chuck, a member having a shoulder forminga raceway for ball bearings also bearing against said chuck and rollerbearings and ball bearings in said respective raceways, the whole beingclosed by said chuck against entrance into the bearing of mill water,and means to introduce lubricant into said bearing.

4. In a four high rolling mill comprising working rolls and back uprolls, bearing members for the back up rolls, and a frame with membersat opposite sides of the roll-s, chucks for the working rolls,anti-frictional nonadjustable bearings in said chucks for said workingrolls, and means at the adjacent ends of the respective chucks, actingagainst one frame member to force said chucks against the opposite framemember, the surfaces of contact of said back up roll bearing members andof said chucks with said opposite frame member being substantially atright angles to the direction of forcing of said chucks, whereby all ofsaid rolls are held in correct positions relative to each other by saidopposite frame member.

EDWIN B. HUDSON.

